This article is about actual problem of unsatisfactory work of system of heating of cycle air on GPA-32 Ladoga compressor unit on CS-48: there were emergency stops, caused by insufficient heating of inlet air of axial compressor.

The processes of incrustation are caused by huge amounts of dissolved salts in the heat medium. When being exploited the evaporation of the heat medium leads to the ion concentration in it and reaches its satiation. Further increase of the ion concentration leads to scaling. Heated shielding pipes are subjected to scaling more than any other elements of the heat generator.

The article analyzes the methodology and specifics of conducting local monitoring and qualitative characteristics of extracted groundwater in the system of PJSC "Gazprom" and OOO "Gazprom transgaz Ukhta" as of January 1, 2015 based. On the basis of the analysis appropriate recommendations are given.

Summarized the reasons for the violation of the dynamic stability of the drill string in the drilling process. The conditions for vibration-free running of the drill string. It is shown experimentally that oscillatory processes in the electrical drive–drill string adequately describes the two-mass model, which allows the development of the structure of electromechanical systems effectively damping oscillations of the drill string due to the capabilities of the drive.

Pyatibrat V. P., Salnikov A. V. Evaluation of the effectiveness the oil-spill booms on water flows

The article deals with the effectiveness of oil-spill booms to contain the accidental oil and oil products spills on watercourses. Particular attention is paid to the construction of a mathematical model to estimate the maximum amount of oil retained on the height of the underwater part of the boom.